It isn’t directly, but I expect that just as Less Wrong has an average IQ of 138, so most atheist groups will select from people with IQs at least a standard deviation above average.
ITYM “most atheist groups in the US”; I wouldn’t assume the same to be true in northern Eurasia, for example.
ITYM “most atheist groups in the US”; I wouldn’t assume the same to be true in northern Eurasia, for example.